We propose an experimentally realizable nonreciprocal magnonic device at the single-magnon level by exploiting magnon block-ade in a magnon-based hybrid system.The coherent qubit-magnon coupling,mediated by virtual ph...We propose an experimentally realizable nonreciprocal magnonic device at the single-magnon level by exploiting magnon block-ade in a magnon-based hybrid system.The coherent qubit-magnon coupling,mediated by virtual photons in a microwave cavity,leads to the energy-level anharmonicity of the composite modes.In contrast,the corresponding dissipative counterpart,induced by traveling microwaves in a waveguide,yields inhomogeneous broadenings of the energy levels.As a result,the cooperative effects of these two kinds of interactions give rise to the emergence of the direction-dependent magnon blockade.We show that this can be demonstrated by studying the equal-time second-order correlation function of the magnon mode.Our study opens an avenue to engineer nonreciprocal magnonic devices in the quantum regime involving only a small number of magnons.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.11934010,U1801661,and U21A20436)National Key Research and Development Program of China(Grant No.2016YFA0301200)+1 种基金Zhejiang Province Program for Science and Technology(Grant No.2020C01019)supported by the National Natural Science Foundation of China(Grant No.11804074)。
文摘We propose an experimentally realizable nonreciprocal magnonic device at the single-magnon level by exploiting magnon block-ade in a magnon-based hybrid system.The coherent qubit-magnon coupling,mediated by virtual photons in a microwave cavity,leads to the energy-level anharmonicity of the composite modes.In contrast,the corresponding dissipative counterpart,induced by traveling microwaves in a waveguide,yields inhomogeneous broadenings of the energy levels.As a result,the cooperative effects of these two kinds of interactions give rise to the emergence of the direction-dependent magnon blockade.We show that this can be demonstrated by studying the equal-time second-order correlation function of the magnon mode.Our study opens an avenue to engineer nonreciprocal magnonic devices in the quantum regime involving only a small number of magnons.
